单项选择题

In an elector-hydraulic steering system, rudder shock is limited by（）

A.a differential gear
B.return springs
C.a hydraulic accumulator
D.relief valves

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单项选择题

Most hydraulic steering gears are fitted with relief valves which（）

A.function when the rudder is amidships
B.relieve excess whip pressure from the hydraulic oil system
C.protect the piping assembly from external rudder shock
D.relieve excessive telemotor pressure

单项选择题

On an electro-hydraulic steering gear, which of the listed devices will keep the rudder from over-traveling the bridge signal?（）

A.Rudder angle indicator
B.Follow-up gear
C.Electric transmitter
D.Rudder angle limit switch

单项选择题

Rudder motion is prevented from exceeding the movement of the steering wheel by the（）

A.return springs
B.six-way valve
C.follow-up gear
D.differential gear